The invention provides a treatment method of laterite-nickel ore. The method comprises the following steps: pelleting laterite-nickel ore, a reducer and additives to obtain laterite-nickel ore pellets; carrying out reducing roasting on the laterite-nickel ore pellets in a rotary hearth furnace to obtain a reduction product; quenching the reduction product with water; crushing the …

Apr 09, 2017· Midrex Process for Direct Reduction of Iron Ore. Midrex is an ironmaking process, developed for the production of direct reduced iron (DRI). It is a gas-based shaft furnace process is a solid state reduction process which reduces iron ore pellets or lump ore into DRI without their melting using reducing gas generally formed from natural gas.

Reduction and the compounds formed when the reduced laterite nickel has been investigated. Nickel laterite with average grain size below 0.149 mm mixed with 13% (weight percent) of coal as reductant then reduced in muffle furnace with temperature from 700 °C to 1000 °C. Type of laterite is used which has high iron (saprolite) and low iron content (limonite).

Abstract A coal-based direct reduction process was used to recover the ferronickel from low-grade nickel laterite ore. The effects of basicity on the compressive strength, metallization rate, microstructure, and reduction characteristics of carbon-bearing nickel laterite ore pellets were investigated. The results show that the metallization rate of iron and the compressive strength …

Nickel slags can be produced through ferronickel preparation by the pyrometallurgical processing of laterite nickel ores; however, such techniques are underutilized at present, and serious environmental problems arise from the stockpiling of such nickel ores. In this study, a modification to the process of ferronickel preparation by the direct reduction of carbon bases …

The invention relates to the field of non-ferrous metallurgy and specifically to a method for processing laterite (oxidized nickel) ores with the direct production of ferronickel in the form of metal granules. The method comprises mixing the ore with a solid reducing agent and with fluxing additives, briquetting the resultant mixture, a reduction firing of the briquetted charge in …

The Direct Nickel Process DNi is an atmospheric hydrometallurgical processing route designed to treat all types of nickel laterite ores, in a single flow sheet to produce a number of final saleable products. The key to the Process is the use of nitric acid as the leaching agent and the subsequent use of a patented recovery and recycling process ...

Recovery of nickel and cobalt from nickel laterites processed according to the Caron process is hampered by reduction of iron in limonite ores and formation of fosterite in saprolite ores. The ...

This paper addresses the modeling of the iron ore direct reduction process, a process likely to reduce CO₂ emissions from the steel industry. The shaft furnace is divided into three sections (reduction, transition, and cooling), and the model is two-dimensional (cylindrical geometry for the upper se …

Keywords: iron, coal, direct reduction, reduction smelting, main processes, reduction. 1. Introduction The processes that produce iron by reduction of iron ore below the melting point of the iron produced are generally classified as direct reduction processes, and the product is referred to as direct reduced iron. The processes that produce molten

Direct Reduction Process Of Nickel Ores Using Rotary Kiln As The Main Equipment. Large laterite nickel ore roasting reduction rotary kiln is one of the key equipment of the laterite kiln smelting process. The ore dried into laterite kiln, kiln heated to 800 ℃ after the removal of water surface of ore and water of crystallization, and iron ...

ferrovanadium, nickel carbonate, nickel laterite, iron ore reduction, and spodumene (lithium) production. In this paper the direct reduction of iron ore to sponge iron is used as an example. The model incorporates a large number of variables covering, amongst others: feed properties and rates, combustion options, kiln

Disclosed is a preparing method for direct reduced iron using low grade difficult-to-reduce high phosphorus iron ore as raw materials. The preparing method includes crushing ferric oxide iron ore to a granularity of 0-1mm so as to produce iron ore fines; mixing the iron ore fines, pulverized coals and auxiliaries sufficiently in a ratio of (80-84): (6-9) : (8-12) by mass percentage, to …

The result indicated that reduction temperature of 1375°C, percentage of CaO of 12% and atomic ratio of C/O of 1.2, the grade of fine ore was improved up to 5.71%. At the same time, the recovery rate of nickel reached up to 96.35%).

The Past and the Future of Nickel Laterites. Nov 07, 2008 · Watanabe, S. Ono, H. Arai, T. Matsumori, Direct Reduction of Garnierite ore for Production of Ferro-Nickel with Rotary Kiln at Nippon Yakin Kogyo …. » More detailed.

Aug 23, 2021· The low-nickel concentrates with 4.65% Ni and 67.68% Fe, produced from direct reduction and magnetic separation process, as a nucleating agent can obviously reduce the activation energy for growth of Ni–Fe alloy particles during the improved direct reduction process from 197.10 to 154.81 kJ/mol with the addition of 20%, resulting in an ...

Ferro-nickel granules were produced from nickel laterite ore/coal composite briquettes by high-temperature direct reduction. The effects of roasting temperature, roasting time, C/O (carbon/oxygen ...

Apr 12, 2021· The method of producing ferronickel at low temperature (1250–1400°C) has been applied since the 1950s at Nippon Yakin Kogyo, Oheyama Works, Japan. Limestone was used as an additive to adjust the slag composition for lowering the slag melting point. The ferronickel product was recovered by means of a magnetic separator from semi-molten slag and metal …

A method for smelting ferronickel alloy from laterite nickel oxide ore belongs to the ferronickel alloy smelting technical field. A direct reduction technique of carbon-bearing pellets in a rotary hearth furnace is adopted to reduce the nickel oxide in nickel ores to iron and nickel; then iron and nickel are smelted; the solid solutions of nickel and iron are agglomerated, cooled, …

Aug 16, 2017· In this case, the ferro-nickel alloy with nickel grade 7.90% and iron grade 77.32% was prepared successfully from the low-grade saprolitic ore with nickel content 1.82%.

Direct Nickel Ltd. successfully tested its DNi laterite leaching process in a 1-t/d pilot plant, a section of which is pictured above. The plant used feed from PT Antam's Buli nickel mine in Indonesia, where Direct Nickel is considering building …

Direct reduced iron (DRI), also called sponge iron, is produced from the direct reduction of iron ore (in the form of lumps, pellets, or fines) into iron by a reducing gas or elemental carbon produced from natural gas or coal.Many ores are suitable for direct reduction. Direct reduction refers to solid-state processes which reduce iron oxides to metallic iron at temperatures below …

Jan 20, 2017· In this study, low grade nickel laterite ore was processed by means of isothermal-temperature gradient method to produce ferronickel nugget. The ore and coal as reductant were ground to obtain the grain size of less than …

nickel iron from carbon base of laterite nickel ore by direct reduction, the gelling materials with silicate tricalcium silicate (C3S) and aluminate tricalcium (C3A) as main components were prepared from coal gangue. The coupling of these two reaction processes was investigated experimentally. 2. Material Analysis and Burdening

The reduction of nickel during reduction is determined by an analysis of metallization values. Metallization analysis used bromine methanol method, while the compound analysis was formed using x-ray Diffractometer. Based on the metallization test, it is known that the laterite nickel ore containing high iron will produce a

laterite nickel feed for an EAF/Blast Furnace [Ni PI], or. iron ore feed for the steel industry. Capital Costs for a sinter plant are low-Approx. US$4M per 100,000 tpy production module . Sintered products command a higher price then DSO-Laterite nickel sinter @ ~1.8% Ni = US$130/t FOB. Iron ore feed @ ~60% Fe = US$85 to US$100/t FOB. GITS

applications including ferrovanadium, nickel carbonate, nickel laterite, iron ore reduction, and spodumene (lithium) production. In this paper the direct reduction of iron ore to sponge iron is used as an example. The model incorporates a large number of variables, covering, among others: feed properties and rates, combustion

Direct Reduction of Low Grade Nickel Laterite Ore to Produce Ferronickel Using Isothermal – Temperature Gradient Zulfiadi Zulhan*, Ian Gibranata Department of …

• Nickel is a US$30 billion a year industry. • The demand for nickel is growing and supply is threatened. • Nickel sulphide discoveries are declinin g yet there is an abundant supply of laterite resources • In Jan 2014 Indonesia banned nickel laterite ore exports • Existing High Pressure Acid Leach (HPAL) and ferronickel processes are

By adding a flux and using a direct reduction roasting and magnetic separation method, iron and nickel enrichment from refractory low-grade nickel laterite ore, …

A new mineral processing and metallurgy technology was proposed, which was that the ferro-nickel concentrate was prepared from laterite ore by coal-based direct reduction. Under the reduction of cheap reductant and the catalysis of composite additives, the effects of coal-based direct reduction were enhanced and the ferro-nickel was extracted.

Direct Reduced Iron - Open Source Ecology. 2 Mar 2016, Small rotary kiln, Brazos County TX, 1966 (image from: Cushing Memorial, material formed by the reduction (removal of oxygen) of iron oxide (iron ore) at, of carbothermal reduction of iron, cobalt, nickel and copper oxid...

Keywords: laterite nickel ore, selective reduction, direct reduction, additives 1. Nickel ­ General Nickel is an important alloying metal with widerange application in the industry.1) Nickel is one of the most important strategic metals which is widely applied to stainless steel, electroplating, catalyst, and petrochemical